PassCheck for Steam

Name: PassCheck for Steam
Author: Flame6

By: Flame6 Add-on

Shows whether a Steam game is available in the current PC Game Pass catalog.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-07-27

Version:

1.1.3

Last updated: 2026-06-28

Features & Capabilities

PassCheck for Steam adds a compact PC Game Pass status badge to Steam game pages. It checks the current US PC Game Pass catalog and clearly shows whether the Steam title appears to be Available, Not available, or if the check failed.

When a match is found, the badge links to the matching Xbox store page. Catalog data is cached locally for 12 hours to reduce repeated requests.

This is an unofficial tool and is not affiliated with Valve, Steam, Microsoft, Xbox, or PC Game Pass. Availability can vary by region, date, subscription tier, and platform. PassCheck checks catalog title availability only; it does not guarantee that the Steam and Microsoft Store versions are identical.

User Growth & Download Statistics

Add-on

By:

Flame6

Daily users:

Version:

1.1.3 Last updated: 2026-06-28

Version code:

6327951

Creation date:

2026-06-08

Risk:

Permissions:

storage

Host permissions:

https://catalog.gamepass.com/*
https://displaycatalog.mp.microsoft.com/*

Content scripts matches:

store.steampowered.com

Size:

29.50KB

Email:

de*****@flame6.com

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-27

Compare stats and ranking:

Ranking

# 105,112 ▲ 946

Other rankings

#205 in steam keyword 51 ▼ 3

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Flame6

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/passcheck-for-steam/

Email:

de*****@flame6.com

Is PassCheck for Steam Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

PassCheck for Steam requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: steampowered.com, gamepass.com, microsoft.com
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

PassCheck for Steam is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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